itch.io

I downloaded the latest build about 3 hours ago. I don't get a Windows Defender threat detected when I scan but I did initially get a warning from Firefox when I downloaded the file and a warning from (I think) Windows Defender when I first ran the exe. I can't replicate now, presumably because I told Windows Defender to not worry about it.

I don't believe a website exists yet beyond the itch pages.  https://wndx.school/p/dragon-ruby-game-toolkit-tutorial is a good video tutorial introduction and I recommend joining the #gamedev Slack channel https://slack.rubymotion.com/